Posts Tagged ‘Web Design Ledger’

Gather several Schutzhund photographers together and they will invariably lament about how frequently we shoot in constantly changing weather (lighting) conditions and how difficult it is. Gives credence to that old notion that if you don’t like the weather, wait 10 minutes. While we cannot control the weather, we can have a plan of action that takes into account different lighting scenarios and makes adjusting camera settings on the fly not as daunting.

A number of available charts that provide aperture and shutter speed settings based on the Sunny 16 Rule are very helpful and are a great starting place for calculating exposure for different creative looks. Just do a search for “aperture shutter speed chart” and a plethora of charts and resources will pop up. The most helpful charts from my perspective as a Schutzhund photographer are those that do not rely solely on the Sunny 16 Rule or ISO 100, but include entries for a full range of ISO settings and calculates the shutter speed for a full range of aperture settings at different EV values. Fred Parker developed one of the better ones that I have come across, as noted in part 1. Copyright restrictions prevent me from re-publishing the chart, but it is available on his website and his article that accompanies the Ultimate Exposure Computer is well worth reading.

Also as explained in Part 1, exposure values can be assigned to different lighting conditions. Using the corresponding value to the expected lighting conditions, photographers can then look at Fred’s Computer to determine which settings would be the most likely to produce a good exposure for the creative goals. Others also have published charts using EV values and can serve the same purpose, but they may only include settings for ISO 100. For example, say it is a sunny day or even a hazy sunny day, the EV values would be 15 and 14, respectively. According to Fred’s Computer, at ISO 200 at f/2.8, the shutter speed would need to be either 1/4000 or 1/8000 for proper exposure. If you dial the aperture to f/5.6 or f/8 – both excellent settings for catching action and depth of field – the shutter speed would be 1/2000 or 1/1000. Do you notice the trend? As the amount of light is cut in half with each step down in the aperture size (higher number), the shutter speed must correspondingly slow down (lower number) in order to allow enough light to fall on the camera sensor to achieve proper exposure. The minimum shutter speed for stopping action is 1/500, according to the experts. But I’ve found that 1/640 to 1/1000 to be workable minimums. You can also adjust to a faster film speed (higher number) to keep the shutter speed where you want it, but then the aperture would have to be adjusted to compensate.

By understanding how these relationships work – either doubling or halving –  photographers have a lot of options and flexibility. Remember it’s a sliding scale. In researching this topic, I also came across several other resources and cheat sheets that may help you keep all this straight. Don’t worry if it seems confusing and hard to remember. Even the most experienced photographers rely on memory aids!

  • The Photo Argus Cheat Sheets for available light (aperture, shutter speed, EV values, ISO); 49 Photo Tips; Photography Cheat Sheet (aperture, ISO, shutter speed); and more
  • PhotoBert Cheat Sheets for photography settings and different camera models
  • Photopoly 22 Useful Photography and Photo Editing Cheat Sheets
  • Web Design Ledger 13 Super Useful Photography Cheat Sheets

There is some duplication from site to site, and some are for sale while others are free downloads. I also recommend Bryan Peterson’s books on Understanding Exposure, Understanding Shutter Speed, and Learning to See Creatively.

Let me know if these resources are helpful!  Happy shooting!

Read Full Post »